CN218760042U - Quick-closing valve disc anti-rotation structure for steam turbine - Google Patents
Quick-closing valve disc anti-rotation structure for steam turbine Download PDFInfo
- Publication number
- CN218760042U CN218760042U CN202222657301.4U CN202222657301U CN218760042U CN 218760042 U CN218760042 U CN 218760042U CN 202222657301 U CN202222657301 U CN 202222657301U CN 218760042 U CN218760042 U CN 218760042U
- Authority
- CN
- China
- Prior art keywords
- valve disc
- sleeve
- quick
- valve
- rotation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Lift Valve (AREA)
Abstract
The utility model discloses an anti-rotation structure of a quick-closing valve disc for a steam turbine, which comprises a valve disc and a fixed sleeve which are connected by screw threads; a pin is also arranged at the joint of the valve disc and the fixed sleeve; one end of the valve disc sleeve is connected with the fixed sleeve through 2 anti-rotation pins; the other end of the valve disc sleeve is fixedly connected with the valve cover through an internal thread cylindrical pin. The structure realizes the anti-rotation function of the DN100 caliber quick-closing valve disc, meets the relevant requirements of the API612 on the quick-closing valve, protects the normal operation of the steam turbine, and avoids the situation that the normal operation of a unit is endangered due to the rotation of the valve disc.
Description
Technical Field
The utility model belongs to the technical field of steam turbine equipment, a steam turbine is with quick valve disc rotation-proof structure that closes of admission is related to.
Background
The quick closing valve of the existing steam turbine is generally not provided with a valve disc rotation prevention function, and the structure of the quick closing valve is shown in the attached drawing 1 and comprises a valve disc 1 and a fixed sleeve 2 which are connected through threads; there are problems in that: medium-temperature medium-pressure steam (parameters are 3.9MPa (a), 440 ℃) impacting the rotation of a turbine rotor horizontally enters the turbine from bottom to top through a quick-closing valve, after the quick-closing valve is opened, the medium-pressure steam can continuously impact a butterfly valve 1, the butterfly valve 1 is in threaded connection with a fixing sleeve 2, and the butterfly valve 1 and the fixing sleeve 2 rotate relatively under long-term operation, so that a valve disc 1 falls into the turbine, the normal operation of the turbine is endangered, and irreversible damage is caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a steam turbine is with quick valve disc rotation-proof structure that closes solves current quick valve disc that closes and does not have the valve disc and prevent the problem of changeing the function.
The utility model adopts the technical proposal that the anti-rotation structure of the quick-closing valve disc for the steam turbine comprises a valve disc and a fixed sleeve which are connected by screw thread; a pin is also arranged at the joint of the valve disc and the fixed sleeve; one end of the valve disc sleeve is connected with the fixed sleeve through 2 anti-rotation pins; the other end of the valve disc sleeve is fixedly connected with the valve cover through an internal thread cylindrical pin.
Further, the pins are arranged along the circumference, at least 4 pins, and the size is phi 8x15mm.
Furthermore, 2 anti-rotation pins are symmetrically arranged along the transverse direction of the contact part of the valve disc sleeve and the fixed sleeve, and the size is phi 16x19mm.
Furthermore, the inner side wall of the valve disc sleeve and the outer side wall of the fixing sleeve are provided with nitride layers.
The utility model has the advantages that:
the structure realizes the anti-rotation function of the DN100 caliber quick-closing valve disc, meets the relevant requirements of the API612 on the quick-closing valve, protects the normal operation of the steam turbine, and avoids the situation that the normal operation of a unit is endangered due to the rotation of the valve disc.
Drawings
FIG. 1 is a schematic view of a prior art quick-closing valve;
FIG. 2 is a schematic view of an anti-rotation structure of a valve disc of a quick-closing valve for a steam turbine according to the present application.
In the figure, 1, a valve disc, 2, a fixing sleeve, 3, a valve disc sleeve, 4, an anti-rotation pin and 5, a pin are arranged.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 2: a kind of steam turbine uses the valve disc anti-rotation structure of the fast closing valve, including valve disc 1 and fixed sleeve 2 of threaded connection; a pin 5 is also arranged at the joint of the valve disc 1 and the fixed sleeve 2; one end of the valve disc sleeve 3 is connected with the fixed sleeve 2 through 2 anti-rotation pins 4; the other end of the valve disc sleeve 3 is fixedly connected with the valve cover through an internal thread cylindrical pin.
The valve cover can not rotate, so the valve disc sleeve 3 connected with the valve cover can not rotate; the valve disc 1 and the fixing sleeve 2 can only slide in the horizontal direction and cannot rotate through an integral structure formed by the pins 5.
The internal thread cylindrical pin adopts a standard ISO8733 specification B10x28.
The pins 5 are arranged circumferentially, at least 4, and have the size phi 8x15mm. The pin 5 is made of ASTM a29M 4137, ensuring that the valve disc 1 and the fixed sleeve 2 do not rotate relative to each other.
The 2 anti-rotation pins 4 are symmetrically arranged along the transverse direction of the contact part of the valve disc sleeve 3 and the fixed sleeve 2, and the size is phi 16x19mm.
The inner side wall of the valve disc sleeve 3 and the outer side wall of the fixed sleeve 2 are provided with nitride layers, so that the quick-closing valve is guaranteed to be smoothly opened without jamming and has enough structural strength.
The motion process of the device is as follows: starting oil is filled in a side oil hole in the right side oil cylinder, the spring is compressed, and the oil cylinder is compressed. When the oil is quickly closed, the mechanism in the oil cylinder moves to the right side, and the fixed sleeve 2 and the valve disc 1 are pulled by the valve rod to move to the right side. The quick-closing valve is opened, and steam is introduced. The valve disc 1 and the fixing sleeve 2 can not rotate relatively under the action of the anti-rotation pin 4.
Claims (4)
1. A valve disc rotation prevention structure for a quick-closing valve for a steam turbine is characterized by comprising a valve disc (1) and a fixed sleeve (2) which are in threaded connection; a pin (5) is also arranged at the joint of the valve disc (1) and the fixed sleeve (2); one end of the valve disc sleeve (3) is connected with the fixed sleeve (2) through 2 anti-rotation pins (4); the other end of the valve disc sleeve (3) is fixedly connected with the valve cover through an internal thread cylindrical pin.
2. An anti-rotation structure of a valve disc of a quick-closing valve for steam turbines according to claim 1, characterized in that said pins (5) are circumferentially arranged in at least 4 pieces and have dimensions Φ 8x15mm.
3. An anti-rotation structure of a valve disc of a quick-closing valve for a steam turbine according to claim 1, characterized in that the 2 anti-rotation pins (4) are arranged symmetrically along the transverse direction of the contact part of the valve disc sleeve (3) and the fixing sleeve (2) and have the size of phi 16x19mm.
4. The valve disc rotation prevention structure for a quick closing valve of a steam turbine according to claim 1, wherein the inner side wall of the valve disc sleeve (3) and the outer side wall of the fixing sleeve (2) are further provided with a nitride layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222657301.4U CN218760042U (en) | 2022-10-10 | 2022-10-10 | Quick-closing valve disc anti-rotation structure for steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222657301.4U CN218760042U (en) | 2022-10-10 | 2022-10-10 | Quick-closing valve disc anti-rotation structure for steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218760042U true CN218760042U (en) | 2023-03-28 |
Family
ID=85698380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222657301.4U Active CN218760042U (en) | 2022-10-10 | 2022-10-10 | Quick-closing valve disc anti-rotation structure for steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218760042U (en) |
-
2022
- 2022-10-10 CN CN202222657301.4U patent/CN218760042U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201636338U (en) | Check valve for large-caliber power plant | |
| CN218760042U (en) | Quick-closing valve disc anti-rotation structure for steam turbine | |
| CN208764356U (en) | A kind of hand liquid-operated flat valve | |
| CN103363147A (en) | Non-wear fixed ball valve with low torque | |
| CN101440883A (en) | Middle and low pressure safety valve | |
| CN108798890B (en) | Variable connecting rod for adjusting compression ratio of engine by rotary valve | |
| CN202691136U (en) | Nuclear grade M type pneumatic directly-through membrane valve | |
| CN202441936U (en) | Shutoff safety valve | |
| CN205298736U (en) | Whole die forging ultra -low temperature upper assembling type connecting rod ball ball valve | |
| CN200999864Y (en) | Valve | |
| CN106246635B (en) | From pressure release piston rod | |
| CN102147016A (en) | Oil drainage valve for fuel system of airplane | |
| CN206035942U (en) | From pressure release piston rod | |
| CN205504144U (en) | Impact mitigation mechanism is prevented to angle stroke cylinder | |
| CN201326791Y (en) | Low-and-medium-pressure safety valve | |
| CN207333795U (en) | A kind of ball valve | |
| CN201954012U (en) | Double-plate butterfly valve of track | |
| CN201273382Y (en) | Support-expansion type dual-seal stop cock | |
| CN203189841U (en) | Fluid automatic stopping device | |
| CN210266122U (en) | Combined type transmission | |
| CN109611435A (en) | A kind of nut | |
| CN107806522B (en) | Steam extraction type quick-closing check valve and working method thereof | |
| CN205937888U (en) | Balanced type case structure of low temperature governing valve | |
| CN203035367U (en) | Piston of engine cylinder and engine cylinder using piston | |
| CN206360733U (en) | Borescope hole stopper structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |